Faculty Profiles - TAMAKOSHI, Koji

Papers - TAMAKOSHI, Koji

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Dietary fiber and risk of colorectal cancer in the Japan collaborative cohort study. Reviewed

Wakai K, Date C, Fukui M, Tamakoshi K, Watanabe Y, Hayakawa N, Kojima M, Kawado M, Suzuki K, Hashimoto S, Tokudome S, Ozasa K, Suzuki S, Toyoshima H, Ito Y, Tamakoshi A; JACC Study Group.

Cancer Epidemiol Biomarkers Prev Vol. 16 page： 668-675 2007

White blood cell count and risk of all-cause and cardiovascular mortality in nationwide sample of Japanese--results from the NIPPON DATA90. Reviewed

Tamakoshi K, Toyoshima H, Yatsuya H, Matsushita K, Okamura T, Hayakawa T, Okayama A, Ueshima H; NIPPON DATA90 Research Group.

Circ J Vol. 71 page： 479-485 2007

Psychological factors and insomnia among male civil servants in Japan. Reviewed

Murata C, Yatsuya H, Tamakoshi K, Otsuka R, Wada K, Toyoshima H.

Sleep Med Vol. 8 page： 209-214 2007

Psychological attitudes and risk of breast cancer in Japan: a prospective study. Reviewed

Wakai K, Kojima M, Nishio K, Suzuki S, Niwa Y, Lin Y, Kondo T, Yatsuya H, Tamakoshi K, Yamamoto A, Tokudome S, Toyoshima H, Tamakoshi A; for the JACC Study Group.

Cancer Causes Control Vol. 18 page： 259-267 2007

A positive association between leptin and blood pressure of normal range in Japanese men. Reviewed

Wada K, Yatsuya H, Tamakoshi K, Otsukai R, Fujii C, Matsushita K, Sugiura K, Toyoshima H.

Hypertens Res Vol. 29 page： 485-492 2006

*Eating fast leads to obesity: findings based on self-administered questionnaires among middle-aged Japanese men and women. Reviewed

Otsuka R, Tamakoshi K, Yatsuya H, Murata C, Sekiya A, Wada K, Zhang HM, Matsushita K, Sugiura K, Takefuji S, OuYang P, Nagasawa N, Kondo T, Sasaki S, Toyoshima H.

J Epidemiol Vol. 16 page： 117-124 2006

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Few epidemiologic studies have examined the association between the rate of eating and obesity. In this study, we cross-sectionally examined the association of the self-reported rate of eating with current Body Mass Index (BMI), and BMI-change from 20 years of age to the current age. METHODS: Subjects were 3737 male (mean age +/- standard deviation and mean BMI +/- standard deviation: 48.2 +/- 7.1 years and 23.3 +/- 2.7 kg/m(2)) and 1005 female (46.3 +/- 7.0 years and 21.8 +/- 2.8 kg/m(2)) Japanese civil servants. We measured self-reported categorical rate of eating, current BMI, BMI at age 20, and BMI-change from age 20. Energy intake was assessed over a 1-month period with a brief-type diet history questionnaire. RESULTS: The multiple regression analysis in which the current BMI was regressed by categorical rate of eating, energy intake, age, and lifestyle factors showed that current BMI steadily increased by -0.99, -0.67, 0.81, and 1.47 kg/m(2) along with the progress of categorical rate of eating from the 'medium' group to 'very slow', 'relatively slow', 'relatively fast', and 'very fast' groups, respectively, in men. In women, the corresponding values were -1.06, -0.35, 0.50, and 1.34 kg/m(2). When the BMI increment from age 20 to current age was regressed in the same manner, the increment was -0.63, -0.34, 0.57, and 1.05 kg/m(2) in men and -0.71, -0.32, 0.34, and 1.14 kg/m(2) in women, respectively. Additionally, both BMI at age 20 and current height were positively associated with rate of eating. CONCLUSIONS: Our results among middle-aged men and women suggest that eating fast would lead to obesity.

*Birth weight and adult hypertension: cross-sectional study in a Japanese workplace population. Reviewed

Tamakoshi K, Yatsuya H, Wada K, Matsushita K, Otsuka R, Yang PO, Sugiura K, Hotta Y, Mitsuhashi H, Kondo T, Toyoshima H.

Circ J Vol. 70 page： 262-267 2006

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Low birth weight has been associated with adult hypertension in several Western populations. This association needs to be evaluated in Japanese people. METHODS AND RESULTS: A population-based cross-sectional study of 3,107 subjects (2,303 males and 804 females) aged 35-66 years was conducted. The participants responded to a questionnaire about their birth weights, blood pressure, medical history, parental history, and lifestyle factors. Hypertension was defined as systolic blood pressure > or =140 mmHg and/or diastolic blood pressure > or =90 mmHg and/or under treatment by anti-hypertensives. Multiple logistic regression analysis adjusted for age, sex, body mass index, parental history, and lifestyle revealed the adjusted odds ratios for hypertension were 1.26 (95% confidence interval: 0.88-1.80), 1.00 (reference), 0.89 (0.73-1.08) and 0.70 (0.49-1.00) in subjects in birth weight categories of <2,500 g, 2,500-<3,000 g, 3,000-<3,500 g, 3,500- g, respectively (p-value for trend =0.009). Furthermore, this inverse association was clearly pronounced in normal-weight subjects. CONCLUSION: Low birth weight was independently associated with adult hypertension in the Japanese workplace population. Our results support the inverse association observed previously in Western populations and suggest that intrauterine environmental insults might lead to permanent changes in the metabolism and structure of the fetal organs influencing the regulation of blood pressure.

Low birth weight is associated with reduced adiponectin concentration in adult. Reviewed

Tamakoshi K, Yatsuya H, Wada K, Matsushita K, Otsuka R, Sugiura K, Kondo T, Toyoshima H.

Ann Epidemiol Vol. 16 page： 669-674 2006

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

PURPOSE: Low birth weight has been associated with metabolic and vascular diseases, but the precise mechanism is debated. Adiponectin is one of the key molecules in metabolic disease, and a decrease in level precedes the onset of type 2 diabetes and development of atherosclerosis. Our aim is to examine whether low birth weight is associated with adiponectin concentration in adult. METHODS: We conducted a population-based cross-sectional study of 2277 subjects (1661 men and 616 women) aged 35 to 66 years who had their self-reported birth weights and adiponectin concentrations measured as adults. RESULTS: After adjusting for potential confounders, including age, sex, current body mass index (BMI), smoking status, alcohol consumption, and exercise, geometric mean adiponectin levels were 6.63, 6.45, 6.86, 7.05, 6.75, and 7.22 microg/mL for subjects with birth weights less than 2500, 2500 to less than 2800, 2800 to less than 3000, 3000 to less than 3200, 3200 to less than 3500, and greater than 3500 g, respectively. A positive association was found between birth weight and adiponectin concentration (trend p = 0.002). Stratified by current BMI of 25 kg/m2, a positive association was not observed for subjects with a BMI less than 25 kg/m2, but was pronounced in those with a BMI of 25 kg/m2 or greater. CONCLUSION: This study indicates that low birth weight contributes to decreased adiponectin concentrations in adult life independently of current BMI, especially for obese subjects.

Inverse association between adiponectin and C-reactive protein in substantially healthy Japanese men. Reviewed

Matsushita K, Yatsuya H, Tamakoshi K, Wada K, Otsuka R, Zhang H, Sugiura K, Kondo T, Murohara T, Toyoshima H.

Atherosclerosis Vol. 188 page： 184-189 2006

Comparison of circulating adiponectin and proinflammatory markers regarding their association with metabolic syndrome in Japanese men. Reviewed

Matsushita K, Yatsuya H, Tamakoshi K, Wada K, Otsuka R, Takefuji S, Sugiura K, Kondo T, Murohara T, Toyoshima H.

Arterioscler Thromb Vasc Biol Vol. 26 page： 871-876 2006

Association between parental histories of hypertension, diabetes and dyslipidemia and the clustering of these disorders in offspring. Reviewed

Wada K, Tamakoshi K, Yatsuya H, Otsuka R, Murata C, Zhang H, Takefuji S, Matsushita K, Sugiura K, Toyoshima H.

Prev Med Vol. 42 page： 358-363 2006

Methods for myometrium closure and other factors impacting effects on cesarean section scars of the uterine segment detected by the ultrasonography . Reviewed

Hayakawa H, Itakura A, Mitsui T, Okada M, Suzuki M, Tamakoshi K, Kikkawa F.

Acta Obstet Gynecol Scand Vol. 85 page： 429-434 2006

Determinants of self-rated health: Could health status explain the association between self-rated health and mortality? . Reviewed

Murata C, Kondo T, Tamakoshi K, Yatsuya H , Toyoshima H.

Arch Gerontol Geriatr Vol. 43 page： 369-380 2006

Plasma fibrinogen levels and cardiovascular risk factors in Japanese schoolchildren. Reviewed

Fujii C, Sakakibara H, Kondo T, Yatsuya H, Tamakoshi K, Toyoshima H.

J Epidemiol Vol. 16 page： 64-70 2006

Factors related to frequency of engaging in outside activities among elderly persons living an independent life at home. Reviewed

Ishikawa M, Tamakoshi K, Yatsuya H, Suma K, Wada K, Otsuka R, Matsushita K, Zhang H, Murata C, Kondo T, Toyoshima H.

Nagoya J Med Sci Vol. 68 page： 121-130 2006

Factors associated with life space among community-living rural elders in Japan. Reviewed

Murata C, Kondo T, Tamakoshi K, Yatsuya H, Toyoshima H.

Public Health Nursing Vol. 23 page： 324-331 2006

Perceived psychological stress and serum leptin concentration in Japanese men. Reviewed

Otsuka R, Yatsuya H, Tamakoshi K, Matsushita K, Wada K, Toyoshima H.

Obesity Vol. 14 page： 1-7 2006

Relationship between body mass index and the risk of ovarian cancer in the Japanese population: findings from the Japanese Collaborate Cohort (JACC) study. Reviewed

Niwa Y, Yatsuya H, Tamakoshi K, Nishio K, Kondo T, Lin Y, Suzuki S, Wakai K, Tokudome S, Yamamoto A, Hamajima N, Toyoshima H, Tamakoshi A; JACC Study Group.

J Obstet Gynaecol Res. Vol. 31 ( 5 ) page： 452-458 2005.10

Language：English Publishing type：Research paper (scientific journal)

AIM: The incidence of ovarian cancer in Japan has increased since the 1970s. The many studies that have assessed the relationship between body mass index (BMI) and the risk of ovarian cancer have produced contradictory results. Here we investigated this relation using data from the Japan Collaborative Cohort Study for the Evaluation of Cancer Risk, which was initiated in 1988. METHODS: A self-administered questionnaire on dietary habits and other risk factors for cancer was completed by 36,456 Japanese women. After 7.6 years of follow up, 38 cases of ovarian cancer were available for analysis. Cox proportional-hazards models were used to compute relative risks and to adjust for confounders. RESULTS: Compared to women with BMI of 18.5-24.9 kg/m2, the relative risk of ovarian cancer was 2.24 (95% CI = 1.10-4.21) for BMI of 25.0-29.9 and 1.78 (95% CI = 0.24-13.34) for BMI of > or = 30 kg/m2. A test for trend revealed that this finding was statistically significant (P = 0.014). CONCLUSION: The results of this study suggest that being overweight is independently associated with a higher risk of developing ovarian cancer in the Japanese population.

Prospective study of alcohol consumption and breast cancer risk in Japanese women. Reviewed

Lin Y, Kikuchi S, Tamakoshi K, Wakai K, Kondo T, Niwa Y, Yatsuya H, Nishio K, Suzuki S, Tokudome S, Yamamoto A, Toyoshima H, Tamakoshi A.

Int J Cancer. Vol. 116 ( 5 ) page： 779-783 2005.9

Language：English Publishing type：Research paper (scientific journal)

Epidemiologic evidence is lacking for the association between alcohol consumption and the risk of breast cancer in Japanese women. We addressed this association in a prospective cohort study with an average follow-up of 7.6 years. At baseline (1988-1990), cohort participants completed a self-administered questionnaire that included alcohol use, reproductive history and hormone use. The women were followed up for breast cancer incidence through December 31, 1997. Cox proportional hazards models were used to calculate relative risks (RRs) and 95% confidence intervals (CIs) for breast cancer incidence and any association with alcohol consumption. During a follow-up of 271,412 person-years, we identified 151 women with breast cancer, of whom 45 were current drinkers and 11 drank > or =15 g of alcohol/day. After adjustment for age and other potential risk factors for breast cancer, the RR for current drinkers was 1.27 (95% CI 0.87-1.84) compared to nondrinkers. Average alcohol intake of <15 g/day did not significantly increase the risk for breast cancer. However, risk was significantly increased for women who consumed > or =15 g/day of alcohol (RR = 2.93, 95% CI 1.55-5.54). Age at starting drinking and frequency of consumption per week were not significantly associated with breast cancer risk. Our cohort study demonstrated that Japanese women who consume at least a moderate amount of alcohol have an increased risk of breast cancer.

Validity of self-reported height and weight in a Japanese workplace population. Reviewed

Wada K, Tamakoshi K, Tsunekawa T, Otsuka R, Zhang H, Murata C, Nagasawa N, Matsushita K, Sugiura K, Yatsuya H, Toyoshima H.

Int J Obes Relat Metab Disord. Vol. 29 ( 9 ) page： 1093-1099 2005.9

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: To assess the validity of self-reported height and weight in a Japanese workplace population, and to examine factors associated with the validity of self-reported weight. DESIGN: Comparison of self-reported height and weight with independent measurement. SUBJECTS: In total, 4253 men and 1148 women aged 35-64 y (mean measured body mass index (BMI): 23.3 kg/m(2) in men, 21.9 kg/m(2) in women) were included in the study. MEASUREMENTS: Self-reported height and weight were obtained by a self-administered questionnaire. Measured height and weight were based on annual health checkups. Sex, age, measured BMI, and the presence of hypertension, diabetes, and hyperlipidemia were examined as potential factors associated with the accuracy of self-reported weight. RESULTS: Self-reported height and weight were highly correlated with measured height and weight for men and women (Pearson's r for men and women: 0.979 and 0.988 in height, 0.961 and 0.959 in weight, 0.943 and 0.950 in BMI, respectively). For men, mean differences+/-2 s.d. of height and weight were 0.078+/-2.324 cm and -0.034+/-5.012 kg, respectively, and for women 0.029+/-1.652 cm and 0.024+/-4.192 kg, respectively. The prevalence of obesity with BMI > or =25 kg/m(2) based on self-reported data (23.6 and 11.5% for men and women, respectively) was slightly smaller than that based on measured data (24.9 and 12.4%, respectively). Specificity and sensitivity, however, were quite high for both men and women (sensitivity was 85.8 and 85.2%, and specificity was 97.0 and 98.9%, respectively). The subjects with higher measured BMI significantly underestimated their weight compared with those with smaller BMI after adjustments for age in men and women. Furthermore, the presence of diabetes in men and age in women affected self-reported weight. Neither the presence of hypertension nor hyperlipidemia was associated with reporting bias. CONCLUSION: The self-reported height and weight were generally reliable in the middle

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Papers - TAMAKOSHI, Koji